Leetcode 63. Unique Paths II
Count the number of distinct paths from the top-left to bottom-right of an m×n grid when you can only move right or down and cells marked 1 are impassable obstacles. This is a grid counting/DP problem with m,n ≤ 100 (answer ≤ 2×10^9).
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Early November, 2025
Microsoft
Mid-level
Mid September, 2024
Meta
Mid-level
Variation of Unique Paths II - Print any path from start (0, 0) to end (rows-1, cols-1) in a matrix avoiding obstacles
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